- Use the form a x ^2 + b x + c , to find the values of a , b , and c .
a = 2 ,b = − 8 , c = 1
- Consider the vertex form of a parabola.
a ( x + d ) ^2 + e
- Find the value of d using the formula d = b /2a .
d=-2
- Find the value of e using the formula e =c − b ^2 4 a .
e = − 7
- Substitute the values of a , d , and e into the vertex form a ( x + d ) 2 + e .
2 ( x − 2 ) ^2 − 7
- Ouma